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Difenoxin Side Effects

The most commonly reported side effects of difenoxin include macular degeneration, therapeutic product effect incomplete, and pain, based on 93 FDA adverse event reports from 2004 to 2025. 60.2% of reports found the drug to be ineffective.

Difenoxin side effects

Percentages show how often each reaction appears relative to total reports for difenoxin.

1
Drug Ineffective60.2%56
2
Macular Degeneration59.1%55
3
Therapeutic Product Effect Incomplete43.0%40
4
Pain41.9%39
5
Chronic Sinusitis41.9%39
6
Paraesthesia Oral41.9%39
7
Pyrexia41.9%39
8
Weight Decreased41.9%39
9
Nausea41.9%39
10
Dyspepsia40.9%38
11
Headache39.8%37
12
Erythema39.8%37
13
Malaise39.8%37
14
Procedural Pain39.8%37
15
Infusion Related Reaction39.8%37

These are voluntary reports and do not establish that difenoxin caused these reactions.

Report severity

86.0%Serious80 reports
63.4%Hospitalizations59 reports
2.2%Fatal2 reports

Seriousness is determined by the reporter, not by OpenClaim.

Difenoxin drug interactions

Other drugs that appear in adverse event reports alongside difenoxin. Drugs flagged as a suspected cause appear in the first column. Drugs taken at the same time but not suspected appear in the second.

Also suspected

1
Atropine62.4%58
2
Triamcinolone58.1%54
3
Adalimumab57.0%53
4
Alprazolam54.8%51
5
Atorvastatin-calcium54.8%51
6
Betamethasone54.8%51
7
Azithromycin54.8%51
8
Budesonide54.8%51
9
Metronidazole54.8%51
10
Clotrimazole54.8%51
11
Clarithromycin54.8%51
12
Diphenhydramine54.8%51
13
Fluticasone54.8%51
14
Hydromorphone-hydrochloride54.8%51
15
Amoxicillin54.8%51

Taken alongside

1
Valsartan34.4%32
2
Atropine34.4%32
3
Ergocalciferol22.6%21
4
Diphenhydramine22.6%21
5
Loperamide-hydrochloride20.4%19
6
Metoclopramide-hydrochloride19.4%18
7
Calcium17.2%16
8
Acetaminophen16.1%15
9
Hydrochlorothiazide14.0%13
10
Pantoprazole-sodium11.8%11
11
Amoxicillin11.8%11
12
Alprazolam10.8%10
13
Potassium-chloride10.8%10
14
Mupirocin10.8%10
15
Adalimumab10.8%10

Co-occurrence in adverse event reports does not establish a drug interaction. Patients often take multiple medications, and these lists reflect prescribing patterns rather than causal relationships. Consult a healthcare provider about potential drug interactions.

Who reports difenoxin side effects

71.0% of difenoxin adverse event reports involve female patients and 17.2% involve male patients. The largest age group is elderly at 76%. These figures reflect who reports side effects, not underlying risk.

Sex

Female71.0%
Male17.2%
Unknown11.8%

Age group

< 20.0%
2–110.0%
12–170.0%
18–6424.1%
65+75.9%

What is difenoxin used for

Conditions and purposes for which patients were taking difenoxin when the adverse event was reported.

DepressionDiarrhoeaDrug Use For Unknown IndicationDiarrhoeaIrritable Bowel SyndromeProduct Used For Unknown IndicationProduct Used For Unknown IndicationPsychotic DisorderShort-bowel Syndrome

Difenoxin brand names and reporting trend

Difenoxin is sold under the brand name Motofen.

Brand names

Motofen68

Quarterly reports (20042025)

200420202025

An upward trend reflects increased FAERS reporting overall, not necessarily increased risk.

Taking difenoxin with another medication?

Ask OpenClaim about your specific drug combination. Get a sourced report using FDA data, drug labels, and medical literature.